Ventilating fan



FIG. 1 is a front view of a "ventilating fan" showing my design;

FIG. 2 is a rear side view thereof;

FIG, 3 is an enlarged side view, the other sides correspond thereof;

FIG. 4 is a perspective view from the front and one side thereof; and,

FIG. 5 is a perspective view from the rear and one side thereof. 

The ornamental design for a "ventilating fan", as shown and described. 